Shop lithium LiFePO4 batteries for caravans, 4WDs, camper trailers, boats and off-grid solar systems. Compare 12V deep-cycle batteries from compact 100Ah options through to 300Ah storage, with selected slimline and higher-voltage models for specialised installations.
Lithium Batteries for Caravan, 4WD and Off-Grid Power
LiFePO4 batteries can provide high usable energy, lower weight and faster compatible charging than many lead-acid alternatives. The correct battery depends on your daily energy use, required runtime, inverter load, charging sources, available space and the continuous-current limit of the battery-management system.
Compare Common 12V Lithium Battery Sizes
| Capacity |
Approx. nominal energy at 12.8V* |
Typical planning use |
| 100Ah |
1,280Wh |
Compact touring and moderate 12V loads |
| 150Ah |
1,920Wh |
Longer fridge, lighting and device runtime |
| 200Ah |
2,560Wh |
Higher daily energy use and larger solar systems |
| 220Ah |
2,816Wh |
Extended caravan and off-grid use |
| 300Ah |
3,840Wh |
Large-capacity systems where space and charging support suit |
*Nominal energy is voltage multiplied by amp-hours. Actual usable energy and runtime depend on the individual battery, BMS limits, load, temperature, wiring and state of charge.
Check the BMS Before Choosing an Inverter
A battery’s amp-hour capacity describes stored energy; it does not by itself determine how large an inverter it can support. Check the battery’s maximum continuous discharge current and short-duration surge limit, then match those ratings with the inverter’s DC demand. High-power 12V inverters can draw well over 100A, so the battery, BMS, cabling, fuse and isolator must all be suitable.
Compare our pure sine wave power inverters after confirming the selected battery’s discharge specifications.
Solar, DC-DC and Mains Charging
Use charging equipment with a LiFePO4 profile and settings permitted by the battery manufacturer. An MPPT solar charge controller manages compatible solar input, while a DC-DC charger can support auxiliary-battery charging from a vehicle. Confirm maximum charge current, charge voltage and temperature limits for the exact battery.
- Do not charge below the manufacturer’s minimum charging temperature unless the battery has approved low-temperature protection or heating.
- Only connect batteries in series or parallel when the manufacturer permits it.
- Use identical batteries of the same model, age and state of charge where series or parallel connection is allowed.
- Use correctly rated fusing, isolation, cable and secure mounting.
Lithium vs AGM Batteries
Lithium batteries are often selected where lower weight, higher usable capacity and stronger cycle performance justify the higher purchase price. AGM deep-cycle batteries remain a practical choice for value-focused systems and applications already configured for AGM charging. Do not install lithium as a direct replacement without checking the charger, alternator strategy, controller settings and load requirements.
Lithium Battery FAQs
What size lithium battery do I need for a caravan?
Add your expected daily energy use in watt-hours, include inverter losses and allow a reserve for poor solar conditions. Then confirm that the battery’s continuous discharge rating can support your highest simultaneous load.
Can I run an inverter from a lithium battery?
Yes, when the inverter’s DC demand remains within the battery and BMS ratings and the cabling, fuse and connections are correctly designed. Battery capacity alone is not enough to confirm compatibility.
Can lithium and AGM batteries be connected together?
They should not normally be combined into the same battery bank because their charging and voltage characteristics differ. Use an appropriately designed system and manufacturer-approved equipment.
